Resemblance in Physical Activity in Families with Children in Time Segments during the Week: The Lolland-Falster Health Study

Therese Lockenwitz Petersen, Jan Christian Brønd, Peter Lund Kristensen, Eivind Aadland, Anders Grøntved, Randi Jepsen

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PURPOSE: Evidence of shared physical activity (PA) habits within families is inconsistent. The present study aimed at examining intrafamily resemblance in PA during different time segments of the week. METHOD: This cross-sectional study used data from the Danish household-based population study Lolland-Falster Health Study. We assessed time spent in various PA intensities and behaviors using a dual-accelerometer system (Axivity AX3). At least one parent and one child per household provided data for a minimum of three weekdays and one weekend day. We analyzed three time segments: early weekdays, late weekdays, and weekends. A linear mixed model regression analysis was used to estimate intraclass correlation coefficients (ICC) of the total family, parent-child dyads, siblings, and parent-parent dyads for PA outcomes, adjusting for sex, age, parental education, and the interaction between sex and age. RESULTS: We included 774 parents (57.9% female, 42.8 ± 7 yr) and 802 children (54.2% girls, 11.1 ± 4.3 yr) nested within 523 families. The clustering among the total family was stronger during late weekdays (ICC = 0.11-0.31) and weekends (ICC = 0.14-0.29) than during early weekdays (ICC = 0.02-0.19). We found stronger clustering among siblings (ICC = 0.08-0.47) and between parents (ICC = 0.02-0.52) than between parents and children (ICC < 0.01-0.37). Generally, the clustering was strongest for light PA, and among PA behaviors, walking showed the highest resemblance across all subgroups. CONCLUSION: Initiatives to promote children's PA that involve parent or sibling coparticipation may focus on the time segment and activity types with the highest resemblance. For the family as a whole, promoting walking or limiting sedentary activities may be a potential target for interventions during late weekdays and weekends.Trial registration: (NCT02482896).
Original languageEnglish
JournalMedicine and Science in Sports and Exercise
Issue number11
Pages (from-to)2283-2289
Publication statusPublished - 1. Nov 2021


  • Accelerometry
  • Adolescent
  • Adult
  • Child
  • Child, Preschool
  • Cross-Sectional Studies
  • Denmark
  • Exercise
  • Female
  • Fitness Trackers
  • Health Behavior
  • Humans
  • Infant
  • Infant, Newborn
  • Male
  • Parent-Child Relations
  • Parents/psychology
  • Sedentary Behavior
  • Siblings/psychology
  • Time Factors
  • Young Adult


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